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2. Upon arriving at the sample station, the nzoprene rubber ends of the sample lines are <br />checked for dirt and dust -accumulation. If necessary, thesample lines am flushed with <br />distilled water. <br />3. The pressure/vacuum line is connected to the vacuum gage of the vacuum hand pump. <br />The .clamp on the. vacuum line it opened and the residual vacuum .,rem - - <br />lYsirncter unit is measured-a6driecorded on the lysiracter sampling log. remaining on . the. <br />4. The pr.essurelvacuum, lincjs connected to- the press ire pump and the discharge (sample) <br />line opened She discharge line is inserted into a clean, u, npreserved 1 liter plastic battle <br />prepared and supplied by the analytical laboratory. <br />S. The pressure pump is activated, forcing air into -the lysimeter. If additional pmssure. is <br />needed to retrieve the fluid more quickly, the pressure is increased until adequate flow is <br />achieved_ <br />6_ The sample is split to other- appropriately preserved battles as necessary -for the analytical <br />requirements- The samples arc placed in an, ice--fUled chest to Mintain a temperature of <br />approximately 4 degrees Celsius during delivery to the laboratory under chainof_,.:ustody <br />procedures- <br />7- 'After the sample is collected, the. besimeter vacumn. is reset (evacuated) to the <br />manufactured recommended value using a' hand vacuum pump. At this time, the <br />lysimeter is tested to evaluate potential leaks that could cause Vacuum pressure joss. The <br />PMs=vJ-vacuunx line is then clamped and the lysimeter s=ircd. <br />23-433949-F0I\23 I OR32s A-13 <br />Copyd& 2400 KWdda. kv- <br />July 14, 2000 <br />